Phylogenetic Systematics
Phylogeney & floral morphology of Centranthus
Phylogeney & biogeography of Symphoricarpos
Molecular Evolution
Comparative Phylogeography
Comparative phylogeography of the Rocky Mountains & western North America
Phylogeney & floral morphology of Centranthus
Phylogeney & biogeography of Symphoricarpos
Comparative phylogeography of the Rocky Mountains & western North America